Senior Python Developer

ScaleneWorks People Solutions LLP; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

ScaleneWorks People Solutions LLP in London is seeking a Senior Python Developer for trading and risk platforms to join a major financial services client. The role is hybrid, requiring 2-3 days in the office.

You will develop Python-based applications, build data pipelines, and work with large financial datasets to support PnL, risk and reporting. Collaboration with quants, traders and risk teams, API development, and contributing to CI/CD and production support are key parts of the role.

Qualifications

• Strong experience in Core Python development (6–10 years).
• Strong SQL skills with ability to handle complex queries and large datasets
• Experience with Python libraries (Pandas, NumPy) for data processing
• Experience building RESTful APIs/services (Flask / FastAPI / Django)
• Strong understanding of data structures and performance optimization
• Experience working with large-scale data processing and performance optimization
• Working knowledge of Unix / Linux environments and basic shell scripting
• Investment Banking / Capital Markets environments experience (Domain Experience)
• Market Risk / CCR / PnL / Trade lifecycle / Reconciliation (Domain Experience)
• Good-to-have: PySpark or large-scale data processing
• Good-to-have: pricing models
• Good-to-have: Unix / Bash scripting
• Good-to-have: global banking environments

Responsibilities

• Develop and enhance Python-based applications for trading and risk use cases
• Build data processing pipelines and automation scripts for trade, risk and reconciliation workflows
• Work with large financial datasets to support PnL, risk and reporting requirements
• Contribute to system design, architecture and scalability decisions
• Collaborate with quants, traders and risk teams to translate business requirements into technical solutions
• Develop and integrate REST APIs and backend services
• Contribute to CI/CD pipelines and deployment processes
• Support production systems (L2/L3) including debugging, enhancements and performance optimization
• Write and maintain unit and integration tests. Ensure high code quality and test coverage
• Participate in code reviews and mentor junior developers where required

Skills

Core Python

SQL

Pandas

NumPy

REST APIs

Unix/Linux

Data structures

Large-scale data processing

Tools

Git

CI/CD

Job description

At ScaleneWorks People Solutions, we're more than recruiters; we're career architects dedicated to connecting exceptional talent with top-tier opportunities. Backed by industry experts, we priorities relationships, offer global opportunities, and champion your success every step of the way.

Ready to shape your future? Explore opportunities with us today.

We are looking for a Sr Python Developer – Trading / Risk Platforms for our well-known client.

• Location: London
• Type of Work: Hybrid(2-3 days in a week from Office)
• Employment Type: Permanent/Contract(Inside IR35)
• Experience: 7–12 years of experience

We are looking for a Python Developer with strong experience in trading and risk management systems within investment banking. The role involves building backend applications and data processing logic supporting risk calculations, trade workflows and reporting.

Key Responsibilities

• Develop and enhance Python-based applications for trading and risk use cases
• Build data processing pipelines and automation scripts for trade, risk and reconciliation workflows
• Work with large financial datasets to support PnL, risk and reporting requirements
• Contribute to system design, architecture and scalability decisions
• Collaborate with quants, traders and risk teams to translate business requirements into technical solutions
• Develop and integrate REST APIs and backend services
• Contribute to CI/CD pipelines and deployment processes
• Support production systems (L2/L3) including debugging, enhancements and performance optimization
• Write and maintain unit and integration tests. Ensure high code quality and test coverage
• Participate in code reviews and mentor junior developers where required

Must-Have Skills

• Strong experience in Core Python development (6–10 years)
• Strong SQL skills with ability to handle complex queries and large datasets
• Experience with Python libraries (Pandas, NumPy) for data processing
• Experience building RESTful APIs/services (Flask / FastAPI / Django)
• Strong understanding of data structures and performance optimization
• Experience working with large-scale data processing and performance optimization
• Working knowledge of Unix / Linux environments and basic shell scripting

Domain Experience (Critical)

• Experience working in Investment Banking / Capital Markets environments
• Market Risk / CCR / PnL / Trade lifecycle / Reconciliation
• Understanding of financial products such as:

Good-to-Have

• Exposure to PySpark or large-scale data processing
• Experience working with quants or pricing models
• Basic scripting (Unix / Bash)
• Prior experience in global banking environments

Note: Candidates without capital markets / risk / trading domain experience will not be considered

Ready to Take the Next Step?

If you're ready to embark on an exciting journey with ScaleneWorks, we’d love to hear from you! Submit your resume today and let’s unlock new possibilities together